Global Power Technologies
1120 - Class I, Division 2, Group D, T3
2.3.6 Press down the button on the shut off valve.
The TEG should immediately start firing, as
noted by a popping inside the combustion
chamber. The TEG will pop until sustained
ignition occurs (purring sound). Record the
time of sustained ignition.
Note: If popping and sustained ignition cannot be obtained
quickly, adjust the air shutters to air rich position
until sustained ignition occurs, then using several
small steps, return the air shutters to the factory set
position.
2 .4 Heat Up to Rated Power
TEG performance is determined by measuring the
voltage across the precision load. This voltage is
defined as V
set
and is measured by the digital panel
meter when the power switch is in the set up posi-
tion.
2 .5 V
set
Versus Time
The heat up characteristic of the TEG is shown in Figure 11, which gives V
set
as a function of
time after ignition. This curve is for a TEG set at the fuel pressure that produces rated power.
During this heat up period, measure the V
set
and record it as item 2 on the start up data sheet at
the time intervals specified. To monitor progress during heat up, compare your measurements
with those shown in Figure11.
After 20 minutes of operation observe the V
set
and determine the following:
1)
If V
set
is near 6 volts, the fuel pressure is set for rated power.
2)
If V
set
is less than 5.5 volts, the fuel pressure is set for less than rated power, but do not
adjust at this time.
3)
If V
set
is greater than 6.5 volts, the fuel pressure is set for more than rated power.
Reduce the fuel pressure by 9.8 kPa (1.4 psi) at this time, see Figure10 and Figure 13.
WARNING:
To prevent damage to the TEG do not allow the V
set
to exceed 7.1 volts
at ambient temperatures above 24ºC (75ºF).
2 .6 V
set
Versus Power
V
set
the voltage across the precision load, is a measure of power. The value of the precision
load (0.387 ohms) is selected to provide the optimum load condition for the TEG.
Figure 11
V
set
Vs Time
18